Ladder scaffold

ABSTRACT

A device for attachment to ladders which will give the painter or other user a solid smooth surface to stand on. This device may be also used with a second one of similar construction, the both units being supported upon the rungs of the ladder, one being used to stand upon the other being used to rest paint or other material thereupon.

United States Patent [72] Inventor Riley Jackson Berkley [56] ReferencesCited ggilalarairie Lake Drive, Fern Park, Fla. UNITED STATES PATENTS407,079 7/1889 Laskey 182/121 Q J- 3x32 2,104,987 l/l938 Harding...182/121 [2 1 e d J Y 5 1 2,703,215 3/1955 Weiss 248/210 [451 mm3,309,053 3/1967 Baker 248/210 3,331,577 7/1967 Grunwaldt 182/121Primary Examiner-Reinaldo P. Machado Attorney-Young & Thompson 1 LADPERP Q ABSTRACT: A device for attachment to ladders which will 4 Clams 2Drawmg give the painter or other user a solid smooth surface to stand[52] mg ("I 182/121 on. This device may be also used with a second oneof similar [5 1] 1m. (I 1206c 7/16 construction, the both units beingsupported upon the rungs of [50] Field of Search 248/210, the ladder,one being used to stand upon and the other being used to rest paint orother material thereupon.

LADDER SCAFFOLD This invention relates to supporting devices, and moreparticularly to a scaffold attachment for ladders.

It is therefore the main purpose-of this invention to provide a ladderscaffold which will be approximately two-thirds the width of the ladderand will provide solid support for a user's feet, allowing the user tobe more comfortable than when standing upon the rung of the ladder.

Another object of this invention is to provide a ladder scaffold whichwill be of such construction as to remain stationary upon one rungthrough the use of support means embracing an upper rung thus renderingthe devicestationary at any elevation upon the ladder it is being usedupon.

A further object of this invention is to provide a scaffold of the abovedescribed type which will also have a hook member at one side which willhookingly engage the upper rung above the face rung supporting thedevice in order that the device will not be disturbed when moving theladder and the device extends partially across the ladder in order toallow the user to pass while moving up and down the ladder withoutinterference with the scaffold or scaffolds in the event that the useralso uses a second scaffold for the placement of paint or other devicesthereupon.

Another object of the present invention is to provide a ladder scaffoldwhich is simple in design, inexpensive to manufacture, rugged inconstruction, easy to use and efficient in operation.

These and other objects will become readily evident upon a study of thefollowing specification together with the accompanying drawing wherein:

-FIG.-I is a side view of the present invention; and FIG. 2 is anenlarged front view of the device shown in elevation and removed fromFIG. 1.

According to this invention, a ladder scaffold is provided with ahorizontal rectangular plate 11 made of aluminum or other suitablematerial. To the underside of plate 11 is secured' a pair of parallelspaced apart bar members 12 which extend the length of plate 1 l. Aladder rung 13 is positioned between bar members 12 and bar members 12prevent lateral movement of plate 11. To the top of plate. 11 is fixedlysecured a vertical plate 14 of "rectangular configuration which isstrengthened by means of a gusset 15.

A horizontal bar member 16 is secured to one side of plate 14 andprovides stop means against the upper adjacent ladder rung 13. A pin 17extends from one side of plate 14 and supports a pivotable S-shaped hook18 having ball-shaped pins 19. When rotated so that one end encirclesladder rung 13, hook 18 serves to prevent the dislocation of scaffold 10when ladder 20 is moved from place to place.

The ball-shaped ends 19 of hook l8'prevent hook 18 from snagging againstclothing and the like.

Scaffold 10 is placed so that a rung 13 is positioned between the barmembers 12 and the bar member 16 of the vertical plate 14 of scaffold 10is positioned against the upper adjacent rung 13, the upper portion ofplate 14 resting against the back of the rung 13 against which barmember 16 rests. This arrangement provides a rugged and stationaryscaffold 10 upon which the user may stand.

If desirable, a second scaffold 10 may be used above the first uponsimilar rungs 13 in order to support cans of paint and the like.

lclaim:

l. A ladder scaffold for attachment to ladders, comprising a horizontalplate, a pair of spaced-apart bars carried on the underside of saidplate to receive a ladder rung between them, a vertical plate rigidlysecured to and upstanding from the rear of said horizontal plate, anupper horizontal bar carried by the forward side of said vertical plateadjacent the upper end thereof for bearing against the underside of aladder rung immediately above the rung disposed between said pair ofbars, and hook means swingably mounted on said vertical plate andswingable over the rung against the underside of which said upper barbears so as to prevent misalignment of the scaffold when the ladder ismoved from place to place.

2. A ladder scaffold as claimed in claim 1, said vertical plate beingspaced a short distance forward from the rear edge of said horizontalplate, and upright gusset means rigidly interconnecting the rear of saidvertical plate and the upper side of said horizontal plate to the rearof said vertical plate.

3. A ladder scaffold as claimed in claim 1, said hook means beingS-shaped and being pivotally mounted on said vertical plate for verticalswinging movement about a horizontal axis disposed midway between thelength of the S-shaped hook means.

4. A ladder scaffold as claimed in claim 1, the horizontal platformextending farther forwardly of said pair of bars than rearwardly of saidpair of bars.

1. A ladder scaffold for attachment to ladders, comprising a horizontalplate, a pair of spaced-apart bars carried on the underside of saidplate to receive a ladder rung between them, a vertical plate rigidlysecured to and upstanding from the rear of said horizontal plate, anupper horizontal bar carried by the forward side of said vertical plateadjacent the upper end thereof for bearing against the underside of aladder rung immediately above the rung disposed between said pair ofbars, and hook means swingably mounted on said vertical plate andswingable over the rung against the underside of which said upper barbears so as to prevent misalignment of the scaffold when the ladder ismoved from place to place.
 2. A ladder scaffold as claimed in claim 1,said vertical plate being spaced a short distance forward from the rearedge of said horizontal plate, and upright gusset means rigidlyinterconnecting the rear of said vertical plate and the upper side ofsaid horizontal plate to the rear of said vertical plate.
 3. A ladderscaffold as claimed in claim 1, said hook means being S-shaped and beingpivotally mounted on said vertical plate for vertical swinging movementabout a horizontal axis disposed midway between the length of theS-shaped hook means.
 4. A ladder scaffold as claimed in claim 1, thehorizontal platform extending farther forwardly of said pair of barsthan rearwardly of said pair of bars.